I really need help with image matrix in matlab.

I was given image https://elearning.uh.edu/bbcswebdav/pid-570151-dt-content-rid-4178856_1/courses/H_20133_ECE_1331_11115/image1%281%29.jpg. How can i create new matrix that contains indices for green values that are larger than a random chosen intensity threshold in mxn size and mxnx3 size. Thanks you very much

[Walter Roberson]

We do not have permission to view that image.

[jason nguyen]

i'm sorry about that.

Answer 1

[ES]

do an

imread

image and then from the result matrix,

Resultant Matrix

Output=[InputMatrix>Threshold].*InputMatrix;

of course, care about data types. [InputMatrix>Threshold] will be of boolean type and InputMatrix will be uint8. convert them all to uint8.

Answer 2

[Image Analyst]

greenChannel = rgbImage(:,:,2);
binaryImage = greenChannel > someThresholdValue;

Most likely that's all you'd need. THat can do everything. If for some reason you need actual row and column indices, then you can get them with find():

[rows, columns] = find(binaryImage);

but like I said, it's highly unlikely you'd need that. If you think you do, then let me know why you think you need that and what you're going to do with that information.